Comparative analysis of imaging features of pulmonary sequestration supplied by thoracic aorta and supplied by abdominal aorta

Objective:To compare and analyze the imaging features of pulmonary sequestration(PS)supplied by thoracic aorta and supplied by abdominal aorta.Methods:A retrospective analysis was performed in 23 patients with PS confirmed by pathology after operation and the CT images were comparatively analyzed according to the source of blood supply.Results:Of the 23 patients with PS,16 cases were supplied by thoracic aorta and 7of them had two supplying arteries,7cases were supplied by abdominal aorta.The lesions appeared as mass with soft tissue density in 21 cases.One case supplied by thoracic aorta showed cystic heterogeneous density.In one case supplied by thoracic aorta,focal thick vessel was shown.The average diameter and length of the supplying arteries from thoracic aorta were(4.8±2.2)mm and(37±12)mm respectively,while these from abdominal aorta were(3.3±0.5)mm and(104±42)mm respectively.The length of supplying arteries and volume of sequestrated lung tissues supplied by thoracic aorta were smaller than those supplied by abdominal aorta(P0.001).Conclusion:PS supplied by thoracic and abdominal aorta share similar imaging features.The length of supplying arteries and the volume of sequestrated lung tissues supplied by thoracic aorta are different from those supplied by abdominal aorta.